Lock type shingle



Nov. 9, 1937.

J. V. DONAHUE LOCK TYPE SHINGLE Filed May 31, 1930 8 I .n 6 m 7 I. a 0 4 m m 1 g 00 4 AM m I O 0 6 Patented Nov. 9, 1937 P T NT orrica amass I I 1 mcxmnsnmom- John v. Donahue, Anderson, Ind. PDlication May 31, 1930, Serial Norah 8,412 4 (or lot-v) -UN1 TED STATES 7 labor cost; which can beapplied to 'circular roofs equally as well as to straight'roofs i and the material cost of which may bebut about twentyper cent more than roll'irooflngu Other objects reside in the individual effect of the entire roof as produced by the-assembled shingles" and in the means for determining the line of the butt ends across the roof. These and additional objects will become apparent'inthe following description of the invention as illustrated by the accompanying drawing, in which Fig. 1 is a top plan view of a shingle embodying my invention;

-Flg. 2, a plan view in reduced scale of a sheet of composition roofing material on which 25 is indicated the manner of 'cutting. the shingles therefrom; I v r Fig. 3,a top plan view of a group of shingles laid to give a "single covering;

Fig. 4, a top plan view of a group of shingles 3o. laid to give a double covering; and

Fig, 5, a top plan view of a group of shingles as applied, to a circular roof.

Like characters of reference indicate like parts in the several viewsin the drawing.

35 Referring first to Fig. 1, I cut a shingle l0, substantially rectangular in shape, one particular style being cut to be sixteen inches high and eighteen inches long, the uppercorners forming ninety degree angles. The right hand verti- 40 cal edge of the shingle ,isnot cut entirely down to the butt end a, but a flap 1 I is left at the lower end to have an upper edge sloping upwardly and toward the vertical edge of the shingle and a slit I2 is cut vertically downwardly from the Juneture of this upper flap edge and the shingle vertical edge. The lower edge of the flap II is a horizontal continuation of' the butt end a oi." the shingle it. The right hand end of the flap l l is bounded by a vertical line, and the slit l2 terminates substantially at or a trifle below the level of the top end of that vertical edge, which point is the juncture of the outer end of the upper sloping edge of the flap therewith. The 55 lower end of the slit l2 terminates in a Short transverse slit H as a means for preventing the tearing downwardly of the slit from its ioweriend.

The left hand: lower corner of the shingle ll has a section removed therefrom which corresponds exactly in dimensions to the flap ll. As indicated in Fig. 2, by reason of the flap 'll being of the same dimensions as the removed section,

one shingle It may becut right after another along the IGIiZthIOI the strip of rooiing It, the flap ii of. theflrstshingle it being cut from the 10 lower corner of thenext succeeding shingle without any waste whatsoever between vertical edges of the shingles, and, since the upper and lower, edges ofthe shingles are parallel one to the other, there isno waste horizontally between upper and lower rows of shingles being cut from thestrip, and similarly, there is no waste along the edges of the strip since the width of the strip of roofing employed is proportioned to equal the combined heights of the rows of shingles to be cut therefrom.

Referring now to Fig.-3; where a single ply roof is to be produced, a shingle I0 is positioned and a single nail l5is driven through the flap ll into the roof sheathing thereunder. The right ."hand vertical edge of the shingle I0 is then raised slightly and the left hand vertical edge of a shingle I0 is inserted under that raised edge and the shingle i0 is then pulled downwardly and toward the shingle Ill tohave the apex of the reentering angle in'the cut away section of the shingle l0 positioned at the lower end of the slit i2, whereupon the butt edge of the shingle I0 will align with the butt edge of the shingle iii, "and a nail i8 is then driven through the flap l2 of the shingle l0. Similarly, the shingle i0" is laid and a nail I! placed through the flap ll" thereof. The next above row of shingles is laid in the same manner but with the vertical edges of the shingles moved over 40 to be half way between the right hand vertical edges of the shingles in the row therebelow. The upper row is laid to have the juncture of the top edge of. the flap ii and the vertical edge of the shingle on the line of the top edges of the .45 shingles of the row next below.

In Fig. 4, the shingles are shown as having been laid to give a "two ply roof in that there is always a thickness or two shingles over the sheathing instead of the minimum of one thickness as results in laying the shingles as above described and as shown in'Fig. 3.: To facilitate the laying of the shingles with less exposure, the right hand vertical edges of the shingles may be provided with a notch l8 spaced upwardly from the butt ends the distance of the exposure desired, and the rows of shingle across the roof may be aligned readily by placing the butt ends of the upper row at the notches in the shingles in the row below.

The shingle is well.adapted for use in laying circular roofs as indicated in Fig. 5. A shingle l0 may be rocked upwardly to have its left hand vertical edge rocked farther back under the overlapping right hand vertical edge of the preceding shingle f0 so that the butt end may be carried around on the desired circle. The locking feature in such cases does not interfere andthe rooflayer does not have to stop and cut and fitl shingles as has heretofore been required in other types.

rying the slope of the vertical edges; While I have here shown and described my invention in the one best form as now known to me it is entirely obvious that structural changes may be made without, departing from the spirit a of the invention, and I, therefore do not desire to be limited to that precise form nor anymore than may be required by file followingclaimsa I claim: 1 r a 1.,A shingle having the general shape of a rectangle, a. nail flap extending laterally from the lower right hand comer of theshingle, and

having a seotionremoved from the other lower corner to form-a reentering angle therein, said shingle having a slit cut downwardly fromits vertical edge partly severing said flap fromlthe shingle,said slit having its lower end terminatingon the same; horizontal line as the apex 0 said reenteringangle. r

2. x A roof comprising a plurality of composition shingles, each of i said shingles being substantially rectangular in shape having a nail flap extending laterally from the lower right corner of the shingle, and having a notch cut out of the lower left hand corner, one of said shingles having a nail through said flap, and the next horizontally adjacent, shingle having its left vertical edge above said notchinserted under the right vertical edge of the first shingle down to said flap and having the notch in the second shingle placed around the upper juncture of the flap with the first shingle to permit the butt end of the second shingle to be aligned in the same line including the butt end of the first shingle, and having a nail through the flap of the second shingle, and succeeding shingles similarly assembled one with the other to form a continuous row across the roof, and a second row of shingles overlapping the first row from above.

3. A roof comprising a plurality ofcomposition The circular shape is simply met by vashingies, each of said shingles being substantially rectangular in shape having a nail flap extending laterally from the lower right corner of the shingle, and having a notch cut out of the lower left hand corner, one of said shingleshaving a nail through said flap, and the next horizontally adjacent shingle having its left vertical edge above said notch inserted under the right vertical edge of the first shingle down to said flap and having the notch in the second shingle placed around the upper juncture of the flap with the first shingle to permit the butt end of the second shingle to be aligned in the same line including the butt end of the first shingle,

and having a,nail through the fiap of the second shingle, andsucceeding shingles similarly assembled one with the other to form a continuous row across the roof, and a second row of shingles overlapping the first row from above said lefthand cornernotch being formed to have all i of the lower left corner to, the left of said notch removed below the level of the bottom of a said flap juncture.

4. ,A roof comprising a plurality of composition shingles, each of said shingles being substantially rectangular in shape having a nail flap extending laterallyfrom the lower right comer of thershinglathe underline of the flap being a continuation oftheunder line 'of the shingle, said flaphaving a slitentering from its upper edge and,extending vertically downward from the right edgeof the shingle, and having the left lower corner cut away to leave a notch therein,

' defined by an upper edge sloping inwardly and downwardly, from the left edge of the shingle to an intersecting, edge extending vertically upward- ,19 frcm the lower shingleedge, said intersecting edge havinga' length approximately thesame as the width, of said flap from the bottom edge to the lower end of said slit, one of said shingles having a nail through said flap near the lower edge thereof, and the next horizontally adjacent shingle, having its left vertical edge inserted under the right vertical edge of the first shingle to have the apex of said notch positioned at the bottom of said slit with the flap of the first shingle under the second shingle to have the butt edge of thesecond shingle aligned with the butt edge of the first shingle, and having a nail through the flap of the second shingle, succeeding shingles similarly assembled one with the other to form a continuous row across the roof, and a second 'row of shingles similarly placed overlapping the firstrow; from above.

JOHN V. DONAHUE. 

